Dross Engineering

Dross Engineering

Dross Engineering

Dross Engineering Builds furnaces and special equipment for recycling non-ferrous metals. Our President built his first furnace in 1970, a de-ironing furnace for his father’s recycling business. In 2015, 45 years later, Dross Engineering has delivered 1309 installations. Dross Engineering only builds equipment for the recycling industry: aluminium, lead, zinc, brass, bronze, copper. The company’s engineers and technicians only think ‘Recycling’. They are very familiar with the whole range of scrap and know how to achieve the best yields. Specialisation is Dross Engineering’s strength.

Company details

9, rue de la Prairie , Bailly-Romainvilliers / Marne , 77700 France
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Business Type:
Industry Type:
Metal Recycling
Market Focus:
Globally (various continents)

In 1970, Jean Armabessaire, President of Dross Engineering, delivered the first ‘transportable’ de-ironing furnace.

The furnace was shipped completely lined and ready to operate. This was a real innovation at the time because furnaces then did not have a casing and were built completely out of bricks.

The first oil crisis forced furnace builders to develop new energy saving techniques as ‘good’ furnaces of the time consumed 150 litres of oil (or equivalent in gas) per tonne.

Since then Dross Engineering has developed furnaces providing secondary smelters with ever increased performance and economy.

In 1990 they produced their first pilot TRF (Tilting Rotary Furnace) inspired by a
very old technique and applied to melting aluminium.

The objective was to combine in a single furnace the advantages of several types of furnace: reverbs, dry hearths, and fixed axis rotaries; and above all to eliminate of greatly reduce the use of salt.

Today over 10 furnace builders worldwide offer their customers tilting rotary furnaces or TRF. These ‘revolutionary’ furnaces can melt at record speed practically the whole range of aluminium scrap, with or without salt, and offering energy returns of 350 – 400 kW per tonne, some 4 times less the in 1970.

Dross Engineering has a ‘honorable’ reference list with to-date some 38 TRF installed iin 20 different countries. Dross Engineering furnaces are fitted with the latest technologies such as oxygen probes, optical pyrometers with video and charge management etc…

Dross Engineering supplies complete secondary aluminium foundries including:

  • Melting furnaces
  • charge machines
  • holding furnaces
  • ingot castings
  • tacking lines
  • aluminium shredder mills
  • dross handling
  • ladles
  • dryer

Their design office provides customers with civil works guideline drawings and filter baghouse calculation sheets.


In the not too far distant future lead mineral deposits will have disappeared and the metal will only be found in scrap metal, mainly in used lead acid batteries.

This ‘lead deposit’ is vast and practically inexhaustible

1,000,000,000 vehicles are on the road of the planet and each vehicle is fitted with a starter battery.
The battery’s life is determined by its use:
• Number of start cycles
• The age of the vehicle
• The local climate
• The local road conditions
• Vehicle maintenance

Battery life ranges from 2-3 years to 6-7 years. If you take 4 years as an average you can easily see the importance of the ‘deposit’.

1,000 vehicles = 250,000,000 batteries with an average weight of 20kg per battery. 5,000,000 tonnes of used lead acid batteries each year, often left in the open and in contact with the environment.

Battery recycling protects our planet, creates jobs and generates wealth.

Recycling 5,000,000 tonnes of Used Lead Acid Batteries per year generates:
• 3,350,000 tonnes of lead (LME lead price: 2100/2200 $US per tonne)
• 300,000 tonnes of polypropylene (average price 300 $US per tonne)
• 1,000,000 m3 of electrolyte (may be commercialised)

Only the polyethylene fraction (separators) is not recycled presently. Annual tonnage: 150,000 tonnes.

Lead Acid Batteries can be recycled again and again, ad infinitum. Battery recycling is profitable but is above all a service to the environment and to humanity. If Lead Acid Batteries are a major source of lead they are also a major source of pollution. Lead Acid Batteries are dangerous and toxic but remain perfectly ‘recyclable’ and are not dangerous when treated with new equipment developed by industry specialists.

Lead Acid Battery recycling remains the only ‘dangerous scrap’ sector to make the fortune of the person who does the recycling, even with a small or very small installation.

To eliminate pollution batteries should be collected and processed locally, so reducing transport costs and storage areas.
International conventions legislate rigorously the transport of Used Lead Acid Batteries.

For the last 44 years, Dross Engineering is one of the rare manufacturers to design and build equipment specifically for recycling non-ferrous metal scrap (lead-aluminium-zinc-copper).

Dross Engineering is able to supply the technical know-how to produce lead from used lead acid batteries (Metal Reduction and Refining).

Dross Engineering has developed a range of breaker-separators to meet market demands: 2.5t/h – 5t/h – 10t/h – 15t/h – 20t/h

Dross Engineering supplies competitively priced equipment with exceptional pay-back times.

Dross Engineering offers innovative, patented, battery processing systems.

The patented system is an improvement on existing procedures:
• Reduced water consumption
• High quality fractions
• Rational installations

Strong points:
• Clean fractions
• Energy savings
• Improved production and ‘quality’ Pb metallics
• High quality Pb paste
• Improved refining conditions
• Reduced water consumption
• Electrolyte processing

Dross Engineering offers their customers exceptional commercial conditions and reduced capital outlay via a partial local fabrication licence agreement for installations of 10t/hour and above.

Dross Engineering has developed high performance, innovative equipment for zinc oxide production, zinc alloy refining and melting low grade zinc scrap such as:

 Tar contaminated roofing materials
 Zinc dross

Our furnaces for the zinc industry are designed and built to meet specific customer requirements but unlike aluminum and lead applications, operation ‘know-how’ for zinc remains the intellectual property of the end user.